Tools / Datadog Interview questions
Why is the Service Catalog important for large engineering organizations?
As the number of services grows into the hundreds, no single engineer can reliably remember who owns what, which services depend on which, or who to page - information that used to live in someone's head or an out-of-date wiki now needs a system of record.
The Service Catalog centralizes that information (ownership, on-call, dependencies, documentation) and keeps it closer to accurate by sourcing it from the same infrastructure and APM data already flowing in, rather than a separate document nobody remembers to update.
During an incident specifically, this materially reduces time-to-mitigation: instead of a Slack thread asking 'does anyone know who owns this service,' a responder can look it up directly and page the right team immediately.
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